Proposed an improved method for capacitor voltage grouping measurement and open circuit fault detection for modular multilevel converter
محورهای موضوعی : اینورترهای هوشمند
Mahdiyeh Eslami
1
,
ابوذر احمدیدرهسیبا
2
1 - کرمان. دانشگاه ازاد. گروه برق
2 - دانشکده مهندسي برق، واحد کرمان، دانشگاه آزاد اسلامی، کرمان، ايران
کلید واژه: Modular Multi-Level Converter, Fault Detection, Capacitor Voltage, Semiconductor Switches, Reduction of Voltage Sensors.,
چکیده مقاله :
The application of renewable energies in power electronics converters has increasingly led to a preference for these converters. Among them, Multi-Level Converters (MLCs), particularly Modular Multi-Level Converters (MMCs), are suitable options for high and medium power applications due to their desirable power quality at the output, low switching losses, component replace ability, and reduction or elimination of output filters. MMCs, in addition to the mentioned features, have characteristics such as no need for multiple DC sources, modular structure, and no need for transformers, making these converters a suitable option for Direct Current (DC) energy transfer applications. In these converters, as the number of sub-modules increases, the usage of other electrical devices, including capacitors and switches, also increases in the converter structure. On the other hand, error occurrence is probable in the modules due to the presence of these components. This reduces the reliability of MMCs. The extensive use of voltage sensors in the MMC structure necessitates the balancing of capacitor voltages. This issue increases hardware complexity, system costs, and converter reliability. To increase the serviceability of the converter and reduce the number of voltage sensors, we need to locate defective modules and quickly detect the occurrence of open circuit faults. In this project, an attempt has been made to provide a new open circuit fault detection configuration using an improved method for group measurement of capacitor voltages and reducing the number of voltage sensors. The proposed method has been implemented on an MMC with 12 sub-modules in MATLAB Simulink software, and the simulation results have been presented.
[1] S. Shao, P. W. Wheeler, J. C. Clare, and A. J. Watson, "Open-circuit fault detection and isolation for modular multilevel converter based on sliding mode observer," in 2013 15th European Conference on Power Electronics and Applications (EPE), 2013: IEEE, pp. 1-9, doi: https://doi.org/10.1109/EPE.2013.6634401.
[2] F. Deng, Z. Chen, M. R. Khan, and R. Zhu, "Fault detection and localization method for modular multilevel converters," IEEE Transactions on Power Electronics, vol. 30, no. 5, pp. 2721-2732, 2014, doi: https://doi.org/10.1109/TPEL.2014.2348194.
[3] S. Shao, A. J. Watson, J. C. Clare, and P. W. Wheeler, "Robustness analysis and experimental validation of a fault detection and isolation method for the modular multilevel converter," IEEE Transactions on Power Electronics, vol. 31, no. 5, pp. 3794-3805, 2015, doi: https://doi.org/10.1109/TPEL.2015.2462717.
[4] B. Li, S. Shi, B. Wang, G. Wang, W. Wang, and D. Xu, "Fault diagnosis and tolerant control of single IGBT open-circuit failure in modular multilevel converters," IEEE Transactions on Power Electronics, vol. 31, no. 4, pp. 3165-3176, 2015, doi: https://doi.org/10.1109/TPEL.2015.2454534.
[5] R. Picas, J. Zaragoza, J. Pou, and S. Ceballos, "Reliable modular multilevel converter fault detection with redundant voltage sensor," IEEE Transactions on power electronics, vol. 32, no. 1, pp. 39-51, 2016, doi: https://doi.org/10.1109/TPEL.2016.2526684.
[6] S. Yang, Y. Tang, and P. Wang, "Open-circuit fault diagnosis of switching devices in a modular multilevel converter with distributed control," in 2017 IEEE Energy Conversion Congress and Exposition (ECCE), 2017: IEEE, pp. 4208-4214, doi: https://doi.org/10.1109/ECCE.2017.8096729.
[7] S. Haghnazari, M. Khodabandeh, and M. R. Zolghadri, "Fast fault detection method for modular multilevel converter semiconductor power switches," IET Power Electronics, vol. 9, no. 2, pp. 165-174, 2016, doi: https://doi.org/10.1049/iet-pel.2015.0392.
[8] S. Yang, Y. Tang, and P. Wang, "Seamless fault-tolerant operation of a modular multilevel converter with switch open-circuit fault diagnosis in a distributed control architecture," IEEE Transactions on Power Electronics, vol. 33, no. 8, pp. 7058-7070, 2017, doi: https://doi.org/10.1109/TPEL.2017.2756849.
[9] J. Zhang, X. Hu, S. Xu, Y. Zhang, and Z. Chen, "Fault diagnosis and monitoring of modular multilevel converter with fast response of voltage sensors," IEEE Transactions on Industrial Electronics, vol. 67, no. 6, pp. 5071-5080, 2019, doi: https://doi.org/10.1109/TIE.2019.2928248.
[10] X. Chen, J. Liu, Z. Deng, S. Song, S. Du, and D. Wang, "A diagnosis strategy for multiple IGBT open-circuit faults of modular multilevel converters," IEEE Transactions on Power Electronics, vol. 36, no. 1, pp. 191-203, 2020, doi: https://doi.org/10.1109/TPEL.2020.2997963.
